Motor-controller.



A. J. HORTON.

MOTOR CONTROLLER.

Patented July 8, 1913.

Wizesaes X 7 T7"zger@j/j;

y k-i, .gmmwwl 1$ @fl h/ ml A. J. HORTON.

MOTOR CONTROLLER.

APPLICATION FILED JULY 6, 1908.

1,066,616, Patented July 8,1913.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFI E;

ALBERT J. HORTON, OF WHITE PLAINS NEW YORK, ASSIGNOR T0 THEHSUTLERLHAMMER MFG. co., OEMILWAUKEE, wi'soonsm, A CORPORATION or WISCONSIN.

MOTOR-CONTROLLER.

Application filed July 6,

To all whom it may concern:

Be it known that I,'ALnEu'r J. Hon'roma citizen of. the United States,residingmt clear, concise, and exact description, reference being had tothe accompanying draw in-g, forming a part of this specification Myinvention relates to improvements in motor controllers, and moreparticularlyto compound starters and, field regulators.

' In controllers for regnlating both anarmature-resist-ance and a fieldresistance, the

controlling member, onmembers, are some-,

times arranged to pass over both sets of resistance, contacts durigg theremoval of the armature resistance from circuit;

My invention has for itsobject: to provide an auxiliary switch for suchcontrollers which: will remove. the: field resistance from circuituntil' the controlling member, or

members, have been moved to cut out all Of the armature nesistance fromcircuit.

For" the pu'lrpgme of illustrating 'my invenr t-ion I' have shown thepre erred form thereof embodied: inla motor 'eontroller -of the samegeneral construction: as that shown in heunderstocd, howeveflhthat myinvention -cuit arrangementffor my dewice inapplicable to otherformsOfjCOHt-ifiliES 7 than that shownin the drawing.

the purpose of; better; illustrating'tlie 'joonn s struction thereon 5 Fig'. g2 isa vertical sectioniil view ta'kenron 'li-n 51-, with theresistance controlling. arms moved to 5 the'central position :Fig. 3*shows As before statem, the device -{shom"m-'the drawingis oftl'xeflsamc generalccnstructionk:

as that showniin my former patent, the sevenal! parts thereof bein'gnggr ntedi on angin. sulating base or jpaneh-J f The panel carries aseriesofi contactsfl, adapted;

to beconnecte d'toa field regulating resist: ance and: a series-'- ofcontacts-3,;adaptcd to? bewconnected to anqarmatuee' controllingelemen'trcomprifses t V e 1 teeme r ecome s pag ' Specification ofLetters Patent. I

Patentedfluly 8. 19 1 1908. Serial No. 442,175. 1

a brush 7. adapted to sweep over the contacts 3, while the member 5carries a brush 8 adapted to sweep over the contacts 2. The brushes 7and 8 maybe of any desired construction. An operating handle 9 issecured to the member. 5, adjacent to itsfree end. A coil spring 10tends to move the vided with a spring butfer- 1-2. The memher 5 carriesa pin 13 adapted to engage with a pin. 14 carried by the member 4whereby, the members 4 and 5 will move together in one direction againstthe action of the spring 10 The member 4 carries an armat-ure15 adapted.to engage with the pole pieces 16- of a retaining magnet 17. VY hen themagnet 17 is energized it holds the member 4 in its final position aftm'the removal o-f the-armature resistance from circuit, thus permittingthe member 5 to 'be movedin an opposite direction, independently of, themember 4. A pin 18, carried by the member 5, is adapted to engage a lug19, carried by the member 4, to limit the movement of themember 5 whenmoved backnove r the 'contacts2'. L t

Aes'previously stated, my invention has for itsobject to provide meansfor removing the-field resistance from circuituntil all of the armatureresistance is removed from circuit. foraccomplishing this resultcomprises an carried by the base, and adapted to move over a series ofthree contacts 22, 23 and 24. Theswitch 20' carries aflspring contactplate vprefem/bly slotted to form two contact fingers 25. A coiledspring 26, carried by the and ab rits other end: to the-switch 20. Thisgspring tends to move the switch 20 against ;sh anld be understood. thatthe auxiliary lswitch may assume various iiormsQr In this ipositiomofthe switch the contact fingers iZivEthereof engage andelectrically-connect contacts22. and 23. As will be hereinatter=setfforth, the contacts 22 and 23 are shomz oiireuited 'U he' ,contact 24sis dead. emcee 2Q-provided with an exten which; projects into the!member 4 against a stop-l1 which is pro- The means which I have shownauxiliary switch-'20, fulcrumed on .a' pin 21' 21;, is connected at oneend to said pin adapted- 1 be connected ina shunt-circuit f around thefield. I regulating resistance, and,

thepeforg whent-gsaid contacts are bridged;

fasbop 27' carried bythe contact 22. It"

23 and 24., therebyvopening the short-circuit around the fieldresistance.

I shall now describe the circuit arrangement shown in Fig. 3. The firsttwo contacts of the series of contacts '2- are dead,

' while the remainder of said contacts are connected to a fieldregulating resistance 30.- The first contact of the series of contacts 3is dead, while'the remainder of said contacts are co nnected'loanal-mature resistance 31. Both members of the controlling element areconnected by conductor 32 through main line switch 33 to the main line34. The last of the seriesofcon'tacts3 is connected by conductor 36 toone terminal of the motor armature a, while the other termi nal of thearmature is connected by conduc-i tor 37 through switch 33 to mainline35. The last of the series of contacts 2. is e nected by conductor 38 toone terminal of the shunt field winding of the motor,

while the other terminal of said windingds connected by conductor .39-toconductor The first live contact 2 isiconnected by conductor 4O to thefirst live contact- 3' which is connected byconductor 41 to oneterminalof the-winding of the retaining magnet 17; The other terminal ofthewinding 17is connected {by conductor 42 through a resistance 43 toconductor 37. Contact 23 isconnected by conductor 44 to conductor 41.Con-v tact 22 is connectedby conductor .45 to the last of the series ofcontacts 2.

In operation, the main line switch 33 is first. closed and then thecontrolling element moved to the right. As already explained,

when the controlling element is moved tothe right, both of the members 4and 5 are actuated. As soon as the'brush 7, carried by the member 4,moves ofl? of the dead contact; and onto the second contact of theseries of contacts 3, circuitis closed through the I motor ai'u'mture.This'circuit may be traced from conductor 34, through SWlt-Cll byconductor 32, through member 4 and brush 7 to contact 3, through theresistance 31 by conductor 36, through the motor armature (a and byconductor 37 to thenmiu lme At thc same time-that the armature circuitis clo'sed-the shunt field circuit is also switch 20 to contact closed.This circuit may be. traced, us already described, to the member 4,thence to contact 3, by conductors 41 and 44 to contact 23, through thecontact fingers of thehist of the series of contiicls -2,"'flud then byconductor 38 through shuntfieldwindiug' by conductor 45 to 5, during theremoval ofithe armature 1e 'sistance'from circuit, will notatfect thestrength of the shunt field winding f. As 1 the controlling element ismoved to the right the member 4 thereof gradually removes the resistance31 from the armature circuit until all of the-sa'me is finally removedfrom cir- *cuit and the armature 15, carried by the member is attractedbythe'retaining magnet 17. The circuitfor the retaining mag.-

net may be traced from the second contact of the series of contacts 3 byconductor 41, through'the Winding 17, by conductor 42, throughresistance 43 to conductor 37 and thence to the main line 35. As thelast section of the resistance 31 is removed from circuit, the pin 29,carried by the member 4,

engages the extension or tail piece 28 of the switch 20, andmovessaidfswitch out-of engagement with the contact 22, and intoengagement with contacts 23 and 24. As soon as the switch 20 is movedout of engagement git-h the contact 22 the short-circuit around 1eresistance. 30 is opened. member 4 has been lockedin its final positi'on by the retaining magnet 17, the'member 5 may be moved back overthe series of contacts 2 to regulate the field resistance 30to cause themotor to operate at the' desired speed. If, for instance, the brush 8 ofthe member 5 is moved into engagement'with the central contact of theseries of-contact-s" 2, the field circuit niaybe traced from memher 5through half of the resistance 30 by conductor 38 through the fieldwinding to main line 35. Inasmuch as the member 5 is no longer underthe'infiuence of the spring 10, it will remain inany desired pos has thetion until manually m'oved to another posi 'cause,'the voltage of themain line fails, the

magnet 17 will release the member 4, which, under the influence of thespring 10, will fly back to its initial position. In returning to itsinitial position, thepiru14 thereby will engage the pin 18,0urricd bythemember 5, and also return the same toits initial position, thus openingboth the. armature circuit and the field circuit. Also, as soon as thenw'rubcr 4 is released and returusto its initial position, the switch 29Will be returned to its initial position, or, in other' each of saidmembers, said members being movable together in one direction and one ofsaid members being/movable in the opposite direction independently ofthe other of said members, and an auxiliary switch for shortcircuitingthe resistance controlled by said independently movable member duringthe joint movement of said members, said auxiliary switch being arrangedto be actuated by said element when in a predetermined position to opensaid short circuit.

2. In a controller for electric motors, in combination, a controllingelement comprising two members, a -sistance regulated by each of saidmembers, said members being movable together in one direction and one ofsaid members being movable independently of the other in an oppositedirection, an auxiliary switch tending to stand in position toshort-circuit the reslstance controlled by said independently movablemember, said switch being adapted to be actuated by said controllingelement when in a predetermined position to open the short-circuit, anda retaining magnet for holding said switch after the same has beenactuated.

In a controller for electric motors, in combination, a controllingelement comprising two members, an armature resistance adapted to beregulated by one of said members, a field resistance adapted to becontrolled by the other of said members, said members being movabletogether mono direction, to remove said armature resistance fromcircuit, an auxiliary switch tending to stand in position toshort-circuit said field resistance, and adapted to be actuated by thearmature resistance controlling member,

when in a predetermined position, to open said short-circuit and aretaining magnet for holding said armature resistance controlling memberupon the removal of said armature resistance from circuit.

.4. In a controller for electric motors, in combination, two resistanceregulating members movable simultaneously to start the motor, one ofsaid members beingmovable independently of the other thereafter and aswitch rendering said independently movable member ineftective duringthe simultaneous operation of said members and arranged to be actuatedby the other of said members when in a predetermined position to rendersaid independentmember effective.

5. In a controller for. electric motors, in combination, two resistanceregulating members movable together in one direction to start the motorand one being independently movable of the other thereafter and a switchrendering said independently movable member ineffective during the jointmovement of both members, said switch being operated by the other ofsaid members when in a predetermined position to render saidindependently movable member effective.

6. In a controller for electric motors, in combination, an armatureresistance, a field resistance, a switch normally short-circuitin g saidfield resistance, an armature resistance controlling member adapted whenin a predetermined position to actuate said switch to open saidshort-circuit around said field re sistance and a field resistancecontrolling member movable with said armature resistance controllingmember to said predetermined position and movable independently thereofthereafter. a

7. In a controller for electric motors, in combination, an armatureresistance, a field resistance, a switch normally short-circuiting saidfield resistance, an armature resistance controlling member adapted whenin a predetermined position to actuate said switch to open saidshort-circuit around said field resistance and a field resistancecontrolling member movable with said armature resistance controllingmember to said predetermined position and movable independently thereofin an opposite direction to regulate said field resistance.

In witness. whereof, I have hereunto subscribed my name in the presenceof two witnesses.

' ALBERT J. HORTON. Witnesses:

\VlLLIAM L. CULLY, CHARLES B. BAKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

